with that gear you would be a tank, but it does cost quite a bit of money for it all. at 70+ go with full chitin +8 set, youll have about 1100-1200ac, depending on jewels and shield, and about 6-7k hp also dependent on jewels.

imho Full Plate +8 build owns any other build till lvl 70.. since ure 60 u'll be far better of with fp build since its gonan give u good hp, quite good mana and average def, but ure average def is covered by ure high hp .. and if u go fp build try to get jewlery tht adds defense ... i myself am a lvl 69 fp priest and i can outtank any shell/ chitin priest anyday

I just switched away from full heal, but I found that it was best to have enough MP for group complete, group heal, group complete. 1920 + 960 + 1920 = 4800MP. That way I could concentrate on extra HP pots to stay alive if my heals are cancelled in a big fight. If you can get uniques like white silver earring (20 def, 5 int, 5 hp) then you win on all 3 fronts. Amulet of goddess is also a reasonable choice for both HP + Int.

Definitely stay chitin build at lvl 60 though. As party healer you can probably afford to go shell build at about 67-68.

I'd avoid the FP build unless you have good uniques that are all giving defence and health. If you can't get over 1k defence with buffs on then you're gonna be toast. If you're on a server with "old school" weapon defences you might be able to get away with lower defence but good weapon defences.